Quick change bit holder with ring magnet

ABSTRACT

A bit holder assembly for a rotary hand or powered tool, includes a body having a hex shank at its rearward end and a retraction collar slidably disposed on the body. The body has a coaxial hex socket formed therein to allow a tool bit to be inserted thereinto. A coil spring biases the retraction collar forwardly and biases a retaining clip toward the bottom of an angular slot formed in the body. The bit is removed by sliding the retraction collar rearwardly, to compress the coil spring and allow the retaining clip to retract back up the slot. A ring magnet is disposed at the forward end of the retraction collar to magnetize a fastener to retain the fastener to the bit.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the benefit of U.S. Provisional Application No.61/599,222, filed Feb. 15, 2012. The entire disclosure of the aboveapplication is incorporated herein by reference.

FIELD

The present disclosure relates to power tool and hand tool bits and bitholders and more particularly, to a bit and a quick change bit holderwith a floating ring magnet for retaining a fastener to the bit.

BACKGROUND

This section provides background information related to the presentdisclosure which is not necessarily prior art.

Auxiliary chucks for power and hand tools have become increasinglycommon, especially as the need and desirability of wider versatility inthe use of power tools and hand tools has increased. Such auxiliarychucks allow the hand or power tool to be used with any of a number ofinterchangeable bits. This, in turn, has resulted in demands for greaterspeed, convenience and ease of insertion and removal of tool bits fromsuch chucks.

In one exemplary type of such conventional quick-release chucks, one ormore detent balls are positioned within a hollow, barrel-shaped tool bitholder body and are resiliently biased into engagement with acircumferentially-extending groove or recess on the shank of the toolbit. An example of such a ball-type mechanism is disclosed in commonlyassigned U.S. Pat. No. 5,988,957 which is herein incorporated byreference. In other conventional quick release chucks, a spring biasedclip is used to engage the bit within the tool bit holder body. Examplesof the spring biased clip design are disclosed in commonly assigned U.S.Pat. Nos. 7,086,813 and 6,929,266 which are herein incorporated byreference.

SUMMARY

This section provides a general summary of the disclosure, and is not acomprehensive disclosure of its full scope or all of its features.

Although the above types of bit holders have been found to functionacceptably, the present disclosure provides a simple, relativelyinexpensive quick-acting chuck assembly or bit holder that includes aring magnet at a forward end of the retraction collar to magnetize afastener and assist in both retaining the fastener to the bit andstabilizing the fastener during its installation. The ring magnet can besupported to allow the magnet to float in a forward direction to engagethe fastener or a rearward direction to release the bit for a rapid onehanded bit change. The length of the float and the geometry of themagnet are such as to allow for the feature to work with fasteners ofdifferent head configurations and with all bit lengths within thenormally accepted industry tolerances.

The present disclosure provides a body having a coaxially extendinghex-shaped bore therein for receiving a hex-shaped bit. A spring biasedretraction collar is mounted to the body and engages means forreleasably retaining the hex-shaped tool within the bore. The retractioncollar supports a magnet at a forward end thereof and allows the magnetto float in a forward direction to engage and magnetize a fastenerengaging the bit. The magnet can be in the form of a ring magnet and canbe fixedly mounted to the retraction collar, wherein the magnet causesthe retraction collar to move in the forward direction. Alternatively,the retraction collar can include a floating sleeve that supports themagnet and allows the magnet to float forward relative to a remainder ofthe retraction collar.

According to further aspects of the present disclosure, a bit holder isprovided with a floating ring magnet supported on the bit holder. Thebit holder can be a pivoting bit holder or a multi-tool bit holder suchas a six-in-one rotary tool.

According to a still further aspect of the present disclosure, a toolbit is provided with a floating sleeve that supports a ring magnet at aforward end of the tool bit. The floating sleeve can be supported on thetool bit by various techniques as will be disclosed herein. The tool bitcan be a torsion bit that includes a shank portion and a working regionwith a reduced diameter torsion zone disposed therebetween. The reduceddiameter torsion zone has a shoulder on a forward and rearward end ofthe torsion zone to aid in retaining the floating sleeve on the toolbit.

According to another aspect, a magnet assembly is provided for retaininga fastener on a tool bit, the magnet assembly including a floatingsleeve and a first ring magnet disposed at a front end portion of thefloating sleeve. A second ring magnet is disposed at a rear end portionof the floating sleeve, wherein the first and second ring magnets arearranged with their poles opposing one another such that the floatingsleeve is moveable freely along a length of the tool bit, and the firstring magnet is configured to engage a head of a fastener. The first andsecond ring magnets are disposed approximately 10 mm apart from eachother and can include an O-ring disposed inside of the sleeve betweenthe first and second ring magnets to resist movement of the floatingsleeve along the tool bit.

Further areas of applicability will become apparent from the descriptionprovided herein. The description and specific examples in this summaryare intended for purposes of illustration only and are not intended tolimit the scope of the present disclosure.

DRAWINGS

The drawings described herein are for illustrative purposes only ofselected embodiments and not all possible implementations, and are notintended to limit the scope of the present disclosure.

FIG. 1 is a perspective view of a bit holder assembly according to theprinciples of the present disclosure;

FIG. 2 is a longitudinal or axial cross-sectional view of the bit holderassembly of FIG. 1;

FIG. 3 is a longitudinal cross-sectional view similar to that of FIG. 2,but illustrating a tool bit fully inserted in the bit holder assembly;

FIG. 4 is a longitudinal cross-sectional view similar to that of FIG. 3,but illustrating a fastener engaged with the tool bit and the retractionsleeve moved forward for magnetically engaging the fastener;

FIG. 5 is a longitudinal cross-sectional view similar to that of FIG. 2,but illustrating the retraction collar pulled rearward and the tool bitbeing removed from the bit holder assembly;

FIG. 6 is a perspective view of an alternative bit holder assemblyaccording to the principles of the present disclosure;

FIG. 7 is a longitudinal or axial cross-sectional view of the bit holderassembly of FIG. 6;

FIG. 8 is a side view of a power tool with the bit holder assembly ofthe present disclosure mounted therein;

FIG. 9 is a side view of a power tool with the bit holder assemblyintegrally formed therein;

FIG. 10 is a perspective view of a bit holder assembly according to athird embodiment;

FIG. 11 is a cross-sectional view of the bit holder assembly of FIG. 10;

FIG. 12 is a partial cross-sectional view of a bit holder assemblyaccording to an alternative embodiment;

FIG. 13 is a plan view of a hog ring type retainer utilized in theembodiment of FIG. 12;

FIG. 14 is a plan view of a rubber O-ring that can be utilized in theembodiment of FIG. 12;

FIG. 15 is a partial cross-sectional view of a bit holder according to afurther embodiment according to the principles of present disclosure;

FIG. 16 is a perspective view of a ball and spring band which areutilized according to the alternative embodiment shown in FIG. 15;

FIG. 17 is a side plan view of a six-in-one rotary tool having afloating ring magnet according to the principles of the presentdisclosure;

FIG. 18 is a side plan view of the six-in-one rotary tool shown in FIG.17 with the ring magnet in a forward position;

FIG. 19 is a cross-sectional view of the six-in-one rotary tool andfloating ring magnet as shown in FIGS. 17 and 18;

FIG. 20 is a cross-sectional view of a pivotal bit holder accessoryhaving a floating ring magnet mounted on a forward end thereof;

FIG. 21 is an alternative pivotal bit holder accessory having a ringmagnet mounted to a floating locking sleeve of the accessory, accordingto the principles of the present disclosure;

FIG. 22 is a perspective view of a tool bit having a magnetic ringsupported by a floating sleeve, according to the principles of thepresent disclosure;

FIG. 23 is a side plan view of the tool bit and floating sleeve shown inFIG. 22;

FIG. 24 is a cross-sectional view of the tool bit and floating sleeveshown in FIGS. 22 and 23;

FIG. 25 is a side plan view of the tool bit shown in FIG. 22;

FIG. 26 is a perspective view of the tool bit with a floating sleeve,according to the principles of the present disclosure;

FIG. 27 is a perspective view of the floating sleeve shown in FIG. 26;

FIG. 28 is a cross-sectional view of the tool bit and floating sleeveshown in FIG. 26;

FIG. 29 is a cross-sectional view similar to FIG. 28, with the floatingsleeve in a forward position, according to the principles of the presentdisclosure;

FIG. 30 is a perspective view of an alternative floating sleeve design,according to the principles of the present disclosure;

FIG. 31 is a perspective view of a floating sleeve according to analternative embodiment of the present disclosure;

FIG. 32 is a perspective view of a floating sleeve according to thepresent disclosure;

FIG. 33 is a perspective view of a tool bit having a floating sleeve,according to an alternative embodiment of the present disclosure;

FIG. 34 is a side plan view of the tool bit and floating sleeve shown inFIG. 33;

FIG. 35 is a cross-sectional view of the tool bit and floating sleeveshown in FIG. 33;

FIG. 36 is a side plan view of the floating sleeve shown in FIG. 33;

FIG. 37 is a perspective view of a tool bit and an alternative floatingsleeve, according to the present disclosure;

FIG. 38 is a cross-sectional view of the tool bit and floating sleeveshown in FIG. 37;

FIG. 39 is a cross-sectional view of the floating sleeve shown in FIG.37;

FIG. 40 is a perspective view of a tool bit and alternative floatingsleeve design, according to the present disclosure;

FIG. 41 is a cross-sectional view of the tool bit and floating sleeveshown in FIG. 40;

FIG. 42 is a perspective view of the floating sleeve shown in FIG. 40;

FIG. 43 is a perspective view of a tool bit having a floating ringmagnet supported by a floating sleeve, according to a further embodimentof the present disclosure;

FIG. 44 is a cross-sectional view of the tool bit and floating sleeveshown in FIG. 43;

FIG. 45 is a side plan view of the floating sleeve shown in FIG. 43;

FIG. 46 is a perspective view of a D-shaped ring utilized with thefloating sleeve shown in FIG. 45;

FIG. 47 is a perspective view of a tool bit and alternative floatingsleeve design according to the present disclosure;

FIG. 48 is a cross-sectional view of the tool bit and floating sleeveshown in FIG. 47;

FIG. 49 is a cross-sectional view taken along line 49-49 of FIG. 48;

FIG. 50 is a side plan view of the floating sleeve shown in FIG. 47;

FIG. 51 is a perspective view of a spring band utilized in theembodiment of FIG. 47;

FIG. 52 is a side plan view of a tool bit having a floating sleeveaccording to an alternative embodiment;

FIG. 53 is an exploded perspective view of the floating sleeve, ball,and spring band utilized in the embodiment of FIG. 52;

FIG. 54 is a perspective view of a tool bit and alternative floatingsleeve design, according to the principles of the present disclosure;

FIG. 55 is a perspective view of the floating sleeve design as shown inFIG. 54 with the locking jaws in a disengaged position;

FIG. 56 is a perspective view of the floating sleeve design shown inFIG. 54 with the lock collar shown in the locked position for engagingthe floating sleeve to the tool bit;

FIG. 57 is a partial cutaway perspective view of an alternative floatingsleeve design according to the present disclosure;

FIG. 58 is a side plan view of a pair of ring magnets disposed around atool bit with a connecting sleeve removed for illustrative purposes,according to the principles of the present disclosure;

FIG. 59 illustrates a sleeve that is mounted to the pair of ring magnetsas shown in FIG. 58.

Corresponding reference numerals indicate corresponding parts throughoutthe several views of the drawings.

DETAILED DESCRIPTION

Example embodiments will now be described more fully with reference tothe accompanying drawings.

Example embodiments are provided so that this disclosure will bethorough, and will fully convey the scope to those who are skilled inthe art. Numerous specific details are set forth such as examples ofspecific components, devices, and methods, to provide a thoroughunderstanding of embodiments of the present disclosure. It will beapparent to those skilled in the art that specific details need not beemployed, that example embodiments may be embodied in many differentforms and that neither should be construed to limit the scope of thedisclosure. In some example embodiments, well-known processes,well-known device structures, and well-known technologies are notdescribed in detail.

The terminology used herein is for the purpose of describing particularexample embodiments only and is not intended to be limiting. As usedherein, the singular forms “a,” “an,” and “the” may be intended toinclude the plural forms as well, unless the context clearly indicatesotherwise. The terms “comprises,” “comprising,” “including,” and“having,” are inclusive and therefore specify the presence of statedfeatures, integers, steps, operations, elements, and/or components, butdo not preclude the presence or addition of one or more other features,integers, steps, operations, elements, components, and/or groupsthereof. The method steps, processes, and operations described hereinare not to be construed as necessarily requiring their performance inthe particular order discussed or illustrated, unless specificallyidentified as an order of performance. It is also to be understood thatadditional or alternative steps may be employed.

When an element or layer is referred to as being “on,” “engaged to,”“connected to,” or “coupled to” another element or layer, it may bedirectly on, engaged, connected or coupled to the other element orlayer, or intervening elements or layers may be present. In contrast,when an element is referred to as being “directly on,” “directly engagedto,” “directly connected to,” or “directly coupled to” another elementor layer, there may be no intervening elements or layers present. Otherwords used to describe the relationship between elements should beinterpreted in a like fashion (e.g., “between” versus “directlybetween,” “adjacent” versus “directly adjacent,” etc.). As used herein,the term “and/or” includes any and all combinations of one or more ofthe associated listed items.

Although the terms first, second, third, etc. may be used herein todescribe various elements, components, regions, layers and/or sections,these elements, components, regions, layers and/or sections should notbe limited by these terms. These terms may be only used to distinguishone element, component, region, layer or section from another region,layer or section. Terms such as “first,” “second,” and other numericalterms when used herein do not imply a sequence or order unless clearlyindicated by the context. Thus, a first element, component, region,layer or section discussed below could be termed a second element,component, region, layer or section without departing from the teachingsof the example embodiments.

Spatially relative terms, such as “inner,” “outer,” “beneath,” “below,”“lower,” “above,” “upper,” and the like, may be used herein for ease ofdescription to describe one element or feature's relationship to anotherelement(s) or feature(s) as illustrated in the figures. Spatiallyrelative terms may be intended to encompass different orientations ofthe device in use or operation in addition to the orientation depictedin the figures. For example, if the device in the figures is turnedover, elements described as “below” or “beneath” other elements orfeatures would then be oriented “above” the other elements or features.Thus, the example term “below” can encompass both an orientation ofabove and below. The device may be otherwise oriented (rotated 90degrees or at other orientations) and the spatially relative descriptorsused herein interpreted accordingly.

With reference to FIGS. 1-5, a first embodiment of the quick-change bitholder 10, according to the principles of the present disclosure, willnow be described. The bit holder 10 includes a body 12 and retractioncollar 14 slidably mounted on the body and retained in place by a sleevebushing 32, as illustrated in FIG. 2. The body 12 can include a hex orpolygonal-shaped shank 16 for mounting the bit holder 10 for rotation bya hand tool or a power tool.

With reference to FIG. 2, the body 12 also includes a hex orpolygonal-shaped socket or bore 20 with the bore 20 opening axiallyoutwardly toward the front or forward end of the bit holder 10. Aplunger bore 22 extends axially from the hex-shaped socket or bore 20toward the rear end of the bit holder assembly 10. Optionally, anejection spring 24 can be disposed in the plunger bore 22. The body 12includes an angular slot 26 formed transversely therein, with the slot26 extending from the radially outer surface of the body 12 in anaxially forward and radially inward direction to communicate with theinterior of the hex bore or socket 20.

A coil spring 30 surrounds a portion of the body 12 and is disposedbetween the body 12 and the retraction collar 14. The coil spring 30abuttingly engages a clip 44 which is received in a groove around amid-portion of the body 12 and terminates in an integrally formed clip34 that is disposed in the angular slot 26 and is designed to releasablyengage a recess 38 in a hex or polygonal-shaped bit tip 40 asillustrated in FIG. 3. An internal annular sleeve 32 attaches to therear portion of the retraction collar 14. The sleeve 32 can be securedto the collar 14 by adhesive, a press fit, thermal bonding, fasteners,pins, or other known attachment techniques. Received in a groove arounda mid-portion of the body 12 is a clip 44 that acts as a stop againstthe sleeve 32 to limit forward travel of the retractable collar 14. Theretractable collar 14 includes a forward shoulder portion 48 that, whenpulled rearward, can engage the spring 30 and pull the clip portion 34of the spring 30 pulling it rearward out of engagement with a bit 40received in the hex-shaped cavity 20.

The retractable collar 14 is of a non-magnetic material with theexception of a magnetic tip 50 that can be in the form of a ring magnet.Alternative magnetic arrangements can be used including multiplenon-ring shaped magnets combined to form a ring-like shape mounted atthe tip of the collar 14. Both faces and the internal bore of themagnet, however, may remain accessible.

In operation, as shown in FIG. 2, the collar 14 starts in a neutralposition with the collar biased forward and the spring clip 34 extendinginto the bore 20. Next, as shown in FIG. 3, a bit 40 is inserted intothe bore 20 so that the spring clip 34 engages a notch 38 in the side ofthe bit 40 to prevent removal of the bit 40 from the bore 20. The bit 40also compresses the ejection spring 24. The retraction collar 14 remainsin the neutral position. Next, as shown in FIG. 4, when the bit 40 isused to drive a screw or fastener 54, the collar 14 floats as a resultof the magnetic force radiating from the outer face to a forwardposition until the outer face of the magnet 50 reaches the fastener,enabling the outer face of the ring magnet 50 to magnetically adhere tothe screw 54. This occurs before the bearing sleeve 32 engages the stopring 44. The magnetic force, generating from the inner face of themagnet 50 by design, then draws the fastener 54 and the sleeve 14jointly towards the body 12, the material of which it is made exhibitingmagnet attractable properties resulting in holding the fastener 54 tightagainst the bit 40. The outer face of the magnet 50 also provides astable surface to reduce movement of the fastener (wobble) duringinstallation. The surface geometry of the face of the magnet 50 beingsuch as to provide support to fasteners of multiple sizes, shapes, andconfigurations.

Next, as shown in FIG. 5, when the operation has finished and the userdesires to remove the bit 40 from the bit holder 10, the user retractsthe retraction collar 14 relative to the body 12, causing the spring 30to compress, and the spring clip 34 to disengage from the bit 40, whichallows the ejection spring 24 to attempt to eject the bit 40 from theholder 10. The ejection is, however, limited in movement to the pointwhere the bit notch 38 is clear, and remains as such, of the clip 34allowing for easy one handed removal, but not to the point where itleaves the bore 20. This controlled ejection is accomplished as a resultof the magnetic field generating from the inner bore of the magnet 50surrounding the bit 40.

With reference to FIGS. 6 and 7, an alternative quick change bit holder60, according to the present disclosure, will now be described. The bitholder 60 includes a body 62 and a retraction collar assembly 64 mountedthereon. The body 62 includes a hex shank 66 and a hex-shaped socket orbore 70 formed in the body 62, with the bore 70 opening axiallyoutwardly toward the front or forward end of the bit holder assembly 60.A plunger bore 72 extends axially from the hex-shaped socket or bore 70toward the rear end of the bit holder assembly 60. Optionally, anejection spring 74 can be disposed in the plunger bore 72. The body 62includes an angular slot 76 similar to the slot 26 as described above. Acoil spring 80 having an integral spring clip 84 surrounds the body 62and is disposed between the body and the clip 84 such that the springclip 84 is disposed in the angular slot 76 for engaging a bit tip 40 inthe manner as discussed above with regard to the previous embodiment.

The retraction collar assembly 64 includes a rear collar 64 a, anintermediate collar 64 b and a forward collar 64 c. A retainer clip 86is disposed in a recessed groove in the outer surface of the body 62 andis disposed against a forward facing shoulder 88 of the rearward collar64 a. The intermediate collar 64 b is press fit onto the rearward collar64 a to trap the retainer clip 86 therebetween. A rearward facingshoulder 90 is provided in a forward direction from the spring 80 on theintermediate collar 64 b. The forward collar 64 c is slidably supportedon a forward end of the intermediate collar 64 b and includes a magnetictip 50 in the form of a magnet ring. The forward collar 64 c acts as afloating sleeve and includes a rearward shoulder portion 90 that engagesa forward shoulder portion 92 of the intermediate collar 64 b to limitthe forward travel of the forward collar 64 c. The rear end of theforward collar 64 c can be stretched over the forward end of theintermediate collar 64 b to complete the collar assembly 64. Slots canbe provided in the rear end of the forward collar 64 c to facilitateassembly on the intermediate collar 64 b. Alternatively, the collarcould be retained through the usage of a spring ring mounted in a grooveon the OD of the intermediate collar 64 b and a mating taper and groovein the ID of the forward collar 64 c.

In operation, a bit tip 40 can be inserted into the hex-shaped bore 70of the bit holder body 62. The spring clip 84 engages a recess 38 in thebit tip 40 in order to retain the bit tip 40 within the bore 70. Theforward collar 64 c is able to float in a forward direction to engage afastener that is engaged by the bit tip 40 in order to magneticallyretain the fastener to the bit tip 40. When the fastener is inserted andthe user wishes to remove the bit tip 40, the retraction collar 64 canbe pulled in a rearward direction so that rearward facing shoulder 94 ofintermediate collar 64 c pulls rearward on the spring 80 to disengagethe spring clip portion 84 from the recess 38 in the bit tip 40. Themagnetic sleeve on this bit holder 60 works just like the other in thatit grabs the screw and pulls it back towards the body 62 and against thebit while reducing wobble.

It should be understood that in each of the embodiments describedherein, the bit holder 10, 60 can be mounted to a drill 2 as shown inFIG. 8 by inserting the hex-shaped shank 16, 66 into a chuck device.Alternatively, the bit holder of the present disclosure can beintegrally constructed into the chuck device of the power tool 2, asshown in FIG. 9. Furthermore, although the present disclosure disclosesa spring clip 34, 84 that is integral with the spring 30, 80, otherarrangements of spring clips that are separate from the coil spring havealso been utilized and can be utilized with the present disclosure.Examples of other arrangements include U.S. Pat. Nos. 7,086,813;6,929,266; 6,261,035; 6,261,035, and 5,988,957 which are incorporatedherein by reference in their entirety. Furthermore, the use of a balldetent mechanism is also known in the art, and can be used in place ofthe integral spring clip and spring arrangement of the presentdisclosure. Further, other previous bit holder designs can be modifiedto include a ring magnet near the front of the outer actuation sleeve toallow the magnet and/or actuation sleeve to float forward to magnetize afastener during operation.

With reference to FIGS. 10 and 11, a third embodiment of thequick-change bit holder 110, according to the principles of the presentdisclosure, will now be described. The bit holder 110 includes a body112 and a retraction collar 114 slidably mounted on the body 112 andretained in place by a sleeve bushing 132, as illustrated in FIG. 11.The body 112 can include a hex or polygonal-shaped shank 116 formounting the bit holder 110 for rotation by a hand tool or a power tool.

With reference to FIG. 11, the body 112 also includes a hex orpolygonal-shaped socket or bore 120 with the bore 120 opening axiallyoutwardly toward the front end of the bit holder 110. A plunger bore 122extends axially from the hex-shaped socket or bore 120 toward the rearend of the bit holder assembly 110. Optionally, an ejection spring 124can be disposed in the plunger bore 122. The body 112 includes anangular slot 126 formed transversely therein, with the slot 126extending from the radially outward surface of the body 112 in andaxially forward and radially inward direction to communicate with theinterior of the hex bore or socket 120.

A coil spring 130 surrounds a portion of the body 112 and is disposedbetween the body 112 and the retraction collar 114. The coil spring 130abuttingly engages a clip 144 which is received in a groove 145 around amid-portion of the body 112 and terminates as an integrally formed clip134 that is disposed in the angular slot 126 and is designed toreleasably engage a recess 38 in a hex or polygonal-shaped bit tip 40 inthe same manner as the embodiment illustrated in FIGS. 3 and 4. Theinternal annular sleeve 132 attaches to the rear portion of theretraction collar 114. Sleeve 132 can be secured to the collar 114 byadhesive, a press fit, thermal bonding, fasteners, pins, or other knownattachment techniques. The clip 144 acts as a stop against the sleeve132 to limit for travel of the retractable collar 114. Retractablecollar 114 includes a forward shoulder portion 148 that when pulledrearward can engage the spring 130 and pull the clip portion 134 of thespring 130, pulling it rearward out of engagement with a bit 40 receivedin the hex-shaped cavity 120.

Retractable collar 114 supports a removable magnet ring 150 that issupported by a removable sleeve 152. Removable sleeve 152 is secured tothe retractable collar 114 by a retainer such as an O-ring or bull nosering 154 that is received in a groove in a forward portion thereof. Thesleeve 152′ is press fit over top of the retainer ring in order toreleasably secure the sleeve 152 to the retraction collar 114.

The operation of the bit tip holder 110 as described is the same as thebit tip holder 10 as described above.

With reference to FIG. 12, a bit holder 160 is shown including ahex-shaped or polygonal-shaped shank 162 and a body portion 164including a hex-shaped or polygonal-shaped bore 166 in an end thereoffor receiving a bit 40. The outer surface of the body 164 is providedwith an elongated annular recess 168. A floating sleeve 170 is providedon the end of the body 164 and supports a ring magnet 50 at an endthereof. The floating sleeve 170 includes an interior annular groove 172that receives a retainer 174 therein. The floating sleeve 170 can beremovably attached to the body 164 by force fitting the body 164 into arear opening 176 of the floating sleeve 170 until the retainer 174 isreceived in the recess 168 of the body 164. The recess 168 is providedwith a forward shoulder 178 and a rearward shoulder 180 that allow thefloating sleeve 170 to travel in a forward and rearward direction asindicated by arrow A while the shoulders 178 and 180 limit the travel ofthe floating sleeve 170 by engagement with the retainer member 174. Asshown in FIGS. 13 and 14, the retainer 174 can take the form of a steelhog ring, as shown in FIG. 13, or a rubber O-ring as shown in FIG. 14.

As an alternative, as illustrated in FIG. 15, the bit holder 160′ canuse an alternative retainer in the form of a ball 190 which can bereceived in an opening 192 in the floating sleeve 170′ and can beretained therein by an annular spring band 194 that can be made of steelor plastic or other suitable material. In operation, the bit holder 160,160′ can be used to engage a fastener via the tool bit 40 and thefloating sleeve 170, 170′ allows the ring magnet 50 to move forwardunder its magnetic force to engage the fastener and magnetize thefastener to improve the retention of the fastener with the tool bit 40.

In a still further alternative embodiment of the bit holder, as shown inFIGS. 17-19, the bit holder 200 can be configured as a six-in-one rotarytool that includes a floating ring magnet 50. In particular, asillustrated in FIG. 19, the tool holder 200 includes a shank 202 that isintegral with, and that extends rearwardly from a socket 204. Shank 202is preferably hex-shaped or polygonal and includes a circumferentialgroove 206. The tool socket 204 includes a bore 208 that extends axiallyfrom the socket end and that is also preferably hex-shaped or polygonal.A reversible bit assembly 210 is received in the bore 208 and includes asleeve 212 having a pair of axial storage cavities 216, 218 separated bya web 220. The sleeve 212 receives a first and a second bit driver 222,224 therein. The outer surface of the sleeve 212, each of the cavities216, 218, as well as a center section of the first and second bitdrivers 222, 224 are each again preferably hex-shaped or polygonal suchthat each of the bit drivers 222, 224 rotate with the sleeve 212 andsocket 204.

Each of the first and second bit drivers 222, 224 are reversible withintheir respective cavities such that either of the bit ends 22 a, 22 b,224 a, 224 b of the first and second bit drivers 222, 224 can extendfrom the sleeve 212. Additionally, sleeve 212 is reversible within thesocket bore 208 such that either the first or second bit drivers 222,224 operably extend from the socket 204. Accordingly, the tool may beconfigured such that any of the four bit driver ends 222 a, 222 b, 224a, 224 b operably project from the socket 204. Either of the bit drivers222, 224 may be removed from the sleeve 212 to expose the hex-shapedcavity 216, 218 for use as a nut driver. Finally, the tools sixth driveris provided by removing the reversible bit assembly 210 from the socketbore to expose the hex-shaped bore 208 for use as a second nut driver.It is noted that the bore 208 is larger than the cavities 216, 218thereby providing the ability to accommodate larger hex-shaped screwheads or nuts. In a preferred embodiment, the bore 208 is a 5/16 inchhex-opening while the cavities 216, 218 are each ¼ inch hex openings.

Similar to the above embodiments, the outer surface of the socket 204can be provided with an elongated annular recess 228 that can be engagedby a retainer 230 of a floating sleeve 232 that supports a ring magnet50 at a forward end thereof. Accordingly, as the tool holder 200 is usedto engage a fastener, one of the bit drivers 222, 224 engage thefastener and the floating sleeve 232 allows the ring magnet 50 to movein a forward direction to engage the fastener to secure the fastener tothe bit driver 222, 224. The floating sleeve 232 can be removed byapplying a slight force in a forward direction to overcome the retainingforce of the retainer 230 within the elongated annular recess 228. Uponremoval of the floating sleeve 232, the reversible bit assembly 210 canbe removed from the socket 204 so that the bit drivers 222, 224 can bechosen for use.

With reference to FIG. 20, a pivotal/rigid accessory 250 for power andhand tools is disclosed and includes a drive component 252 adapted to beconnected to a power tool or hand tool and a driven component 254 thatis pivotally connected to the drive component 252. A locking sleeve 256is provided for securing the driven component 254 for non-pivotalmovement relative to the drive component 252, or the locking sleeve 256can be moved to a disengaged position that allows the driven component254 to pivot relative to the drive component 252. A pivot mechanism ofthis type is disclosed in U.S. Pat. No. 7,942,426, which is hereinincorporated by reference. According to the principles of the presentdisclosure, a floating sleeve 260 can be provided at the forward end ofthe driven component 254 and supports a magnetic ring 50 at a forwardend thereof to aid in retaining a fastener on a bit 40 received in ahex-shaped bore in the driven component 254. As illustrated in FIG. 20,the floating sleeve can include a retainer 262 that can be received inan elongated annular recess 264 on the outer surface of the drivencomponent 254 to allow the floating sleeve 260 to move in a forward andrearward axial direction as indicated by arrow A.

As an alternative, as illustrated in FIG. 21, the ring magnet 50 can besecured to the front end of the locking sleeve 256′ which can be allowedto float in a forward direction to allow the ring magnet 50 to engage afastener secured to the tool bit 40 received in a bore in the drivencomponent 254 of the tool holder. FIG. 21 illustrates the pivotingarrangement between the driving component and the driven componentwhich, again, is detailed in U.S. Pat. No. 7,942,426, which is hereinincorporated by reference in its entirety.

With reference to FIGS. 22-25, a tool bit 300 having a floating ringmagnet 50, according to the principles of the present disclosure, willnow be described. The tool bit 300 includes a shaft having a hex-shapedshank 302 at a first end, and a working region 304 disposed at a secondend. The shaft can have a section between the hex-shaped shank 302 andthe working region 304 that has a reduced diameter region 306 that isdisposed between two shoulders 308, 310. The reduced diameter region 306provides a torsion zone that allows the shaft to twist to absorb forceswhile the tool bit 300 is being used to drive a fastener. A tool bit 300having a torsion zone of this type is generally known in the art asdisclosed by U.S. Pat. No. 5,704,261.

As illustrated in FIGS. 24 and 25, the working region 304 of the toolbit 300 can be provided with various types of drive heads such asPhillips, flat, hex, square, and other known types of drive heads. Arecessed groove 312 is provided in the working region 304 for receivinga retainer ring 314 therein. A ring magnet 50 is supported by a sleeve316 that is retained on the tool bit 300 by the retainer ring 314 thatis received within the recessed groove 312. As the tool bit 300 isengaged with a fastener, the floating sleeve 316 is moved in a forwarddirection to allow the ring magnet 50 to engage the fastener to assistin retaining the fastener to the tool bit 300. The floating sleeve 316includes an interior shoulder 318 that engages the retainer 314 to limitthe sleeve's forward axial travel. The tool bit 300 includes a shoulder320 at an end of the working region 304 that limits the axial travel ofthe floating sleeve 316 in the opposite direction. The floating sleeve316 can optionally be removed from the tool bit 300 by pulling on thefloating sleeve 316 in an axial direction to overcome the retainer 314.The retainer 314 can be a rubber O-ring or a steel hog ring that can beflexed inward when the floating sleeve 316 is either inserted onto orpulled off of the tool bit 300.

With reference to FIGS. 26-29, an alternative arrangement for mounting aring magnet 50 to a tool bit 300 such as the tool bit as describedabove, will now be described. The ring magnet 50 is supported by afloating sleeve 330 that is slidably received on a forward end of thetool bit 300. The floating sleeve 330 includes a plurality of axiallyextending fingers 332 that are integrally formed with the sleeve 330 andreleasably engage the reduced diameter region of the tool bit betweenthe two shoulders 308, 310. FIG. 28 illustrates the floating sleeve 330in a rearward position, while FIG. 29 illustrates the floating sleeve330 in a forward position for the ring magnet 50 to engage a fastener tohelp retain the fastener on the tool bit 300. The floating sleeve 330can be removed from the tool bit by pulling forward on the floatingsleeve 330, thus causing the fingers 332 to flex radially outward overtop of the increased diameter portion at the head 304 of the tool bit300. It is noted that the floating sleeve 330 can be made from plastic,rubber, or other materials that allow flexibility of the fingers 332.The ring magnet 50 can be secured to the floating sleeve 330 byadhesives, in-molding, or other known fastening techniques.

With reference to FIG. 30, an alternative floating sleeve 340 design isshown for supporting a ring magnet 50 that can be received on a tool bit300. The sleeve 340 includes a first end 342 supporting the ring magnet50 and a second end 344 including a single elongated slot 346 thatallows the second end 344 of the sleeve 340 to flex outward forinsertion of a tool bit 300 therein. The interior of second end 344 ofthe sleeve 340 includes a plurality of radially inwardly extending tabs348 that are received in the reduced diameter portion 306 of the toolbit 300 and engage the forward and rearward shoulders 308, 310 to limitaxial movement of the sleeve 340 along the length of the tool bit 300.The floating sleeve 340 can be made from plastic or rubber

With reference to FIG. 31, a floating sleeve 350, according to analternative embodiment, can include a plastic cup 352 that receives thering magnet 50 at a forward end thereof and a rubber sleeve 354 at arearward end thereof. The interior surface of the rubber sleeve 354includes a plurality of radially inwardly extending tabs 356 at itsrearward end, as illustrated in phantom in FIG. 31. The radiallyinwardly extending tabs 356 are flexible to allow a tool bit 300 to beinserted into the sleeve 350 so that the tabs 356 engage the reduceddiameter portion 306 between the forward and rearward shoulders 308, 310of the tool bit 300. Thus, the sleeve 350 is allowed to float in aforward and rearward direction in the manner as described with regard tothe above described embodiments.

With reference to FIG. 32, an alternative floating sleeve 360 design isprovided in which a floating ring magnet 50 is supported at a first endof a rubber sleeve 360. The second end of the sleeve includes aplurality of radially inwardly extending tabs 362 that are flexible toallow a tool bit 300 to be inserted into the sleeve 360 wherein the tabs362 are disposed in the reduced diameter portion 306 between the forwardand rearward shoulders 308, 310 of the tool bit 300. The ring magnet 50can be reinforced with a metal or plastic cap 364 disposed between thering magnet 50 and the first end of the rubber sleeve 360.

With reference to FIGS. 33-36, an alternative floating sleeve 370 isprovided for supporting a ring magnet 50 in a forward end 372 thereof.The floating sleeve 370 can be made from plastic and can include one ormore flexible fingers 374 that engage the reduced diameter portion 306of the tool bit 300 between the forward and rearward shoulders 308, 310thereof. The fingers 374 can include a radially inwardly protruding endportion 376 that engages the reduced diameter portion 306 of the toolbit 300. The elongated fingers 374 are integrally formed with theplastic sleeve 370 to allow the fingers 374 to flex radially outwardwhen a tool bit 300 is inserted therein or removed therefrom.

With reference to FIGS. 37-39, an alternative arrangement of a floatingsleeve 380 is provided wherein the flexible fingers 382 are made from aspring steel and are separately attached to the floating sleeve 380which can be made from plastic or metal. The flexible fingers 382operate in the same manner as the fingers 374 disclosed in FIGS. 33-36to retain the floating sleeve 380 onto a tool bit 300 while allowing thesleeve 380 to float in a forward and rearward direction until thefingers 382 engage the forward or rearward shoulders 308, 310 of thetool bit 300. The fingers 382 include radially inwardly protrudingportions 384 that engage the reduced diameter portion 306 of the toolbit 300. The flexible fingers 382 can be secured to the sleeve 380 by arivet 386 or can be in-molded into the sleeve 380. The sleeve 380includes a pair of opposing windows 388 to receive the fingers 382.

With reference to FIGS. 40-42, an alternative floating sleeve 390 isprovided for supporting a ring magnet 50 in a forward end thereof. Thefloating sleeve 390 can be made from plastic, rubber, or metal and caninclude a recessed annular groove 392 on an exterior surface thereof aswell as a pair of oppositely disposed windows 394 that extend from thegroove 392 into the interior of the sleeve 390. A rubber O-ring or a hogring 396 can be provided in the annular groove 392 so as to extend intothe window portion 394 of the annular sleeve 390 in such a manner thatthe O-ring or hog ring 396 can be received in the reduced diameterportion 306 of the tool bit 300 between the forward and rearwardshoulders 308, 310 thereby retaining the floating sleeve 390 onto thetool bit 300. The reduced diameter portion 306 of the tool bit allowsthe floating sleeve 390 to move in a forward and rearward direction toallow the ring magnet 50 to engage a fastener for securing the fastenerto the tool bit 300.

With reference to FIGS. 43-46, a still further alternative embodiment ofthe floating sleeve 400 is shown wherein the floating sleeve 400supports a ring magnet 50 at a forward end and includes an exteriorannular groove 402 with an opening 404 on one side that communicates tothe interior of the sleeve 400. The annual groove 402 receives aD-shaped ring 406 having a generally flat portion 408 along one sidethereof that is received in the window opening 404 of the annular groove402 so that it communicates to the interior of the sleeve 400. The flatportion 408 of the D-shaped ring 406, as shown in FIG. 46, is receivedin the reduced diameter portion 306 of the tool bit 300 between theforward and rearward shoulders 308, 310 to limit the axial movement ofthe floating sleeve 400 in the forward and rearward directions.

With reference to FIGS. 47-51, an alternative arrangement of thefloating sleeve 410, according to the principles of present disclosure,will now be described. The floating sleeve 410 includes an elongatedannular recess 412 on an outer surface thereof and a plurality of windowopenings 414 extending therethrough within the elongated annular recess412. The openings 414 each receive a ball 416 therein and a spring band418 is received within the elongated annular recess 412 over top of theballs 416 to secure the balls 416 within the openings 414. The balls 416are designed to be received in the reduced diameter portion 306 of thetool bit 300 between the forward and rearward shoulders 308, 310 tolimit the axial movement of the floating sleeve 410 in the forward andrearward directions. During insertion of the tool bit 300 into thefloating sleeve 410, the spring band 418 allows the balls 414 to bepushed radially outward against the spring force of the band 418 whilethe head of the tool bit 300 is inserted into, or removed from, thesleeve 410. As the balls 416 reach the reduced diameter portion 306, theballs 416 move radially inward reducing the force of the spring band 418on the balls 414. It is intended that the balls 414 provide aninterference when engaging the forward and rearward shoulders 308, 310of the reduced diameter portion 306, but do not provide significantresistance to the floating motion of the sleeve 410 along the tool bit300.

With reference to FIGS. 52 and 53, an alternative floating sleeve 420 isshown utilizing a single ball 422 wherein the spring band 424 isprovided with an opening 426 therein for maintaining the position of thespring band 424 relative to the ball 422 that is received in the singleopening 426 of the floating sleeve 420.

With reference to FIGS. 54-56, an alternative floating sleeve 430,according to the principles of present disclosure, will now bedescribed. The floating sleeve 430 supports a ring magnet 50 at aforward end thereof and includes a pair of lock jaws 432 that arepivotally mounted to the floating sleeve by pivots 434. The lock jaws432 each include radially inwardly extending tabs 436 that are designedto be engaged within the reduced diameter portion 306 of the tool bit300. The lock jaws 432 can be pivoted to an engaged position, asillustrated in FIG. 54, and a lock collar 438 can be pulled over top ofthe lock jaws 432, as illustrated in FIG. 56, to secure the lock jaws432 to the tool bit 300. The ring magnet 50 is supported at the forwardend of the floating sleeve 430 and the lock jaws 432 limit the axialmovement of the floating sleeve 430 along the tool bit 300 to allow thering magnet 50 to float to an engaged position when the tool bit 300 isengaged with a fastener. In order to remove the sliding sleeve 430 fromthe tool bit 300, the lock collar 438 can be pulled in a forwardposition allowing the lock jaws 432 to be pivoted radially outward sothat the tool bit 300 can be removed from the floating sleeve 430. It isnoted that the lock collar 438 can be made of a flexible material, orcan have a rigid outer ring with a flexible material on the interiorthereof that allows the lock collar 438 to be retained on the lock jaws432 when they are in the locked position.

With reference to FIG. 57, an alternative floating sleeve 440 is shownincluding a ring magnet 50 at a forward end of a plastic sleeve. Theplastic sleeve 440 has a slot 442 therein and has exterior cam surfaces444 thereon. A rotating sleeve 446 is engaged with the cam surfaces 444of the sleeve 440 and the rotating sleeve 446 can be rotated to causeplastic sleeve 440 to be retained in a radially inward direction topositively engaged the radially inwardly extending tabs 448 of thesleeve 440 within the reduced diameter portion 306 of the tool bit 300between the forward and rearward shoulders 308, 310 thereof. Therotating sleeve 446 can also be rotated to an unlocking position thatallows the sleeve 440 to flex outwardly sufficiently enough to allowremoval of the bit 300 from the floating sleeve 440.

With reference to FIGS. 58 and 59, a further embodiment of the presentdisclosure will now be described. With this embodiment, the use of atool bit 450 having a hex-shaped shaft 452 without a reduced diameterportion is provided. A floating sleeve 454 is provided with two interiorring magnets 456, 458 (as illustrated in FIG. 58 with the sleeve 454removed) which are positioned with both poles opposing one another atapproximately 10 mm apart. With both poles of the ring magnets 456, 458opposing one another, the sleeve 454 will move freely along a length ofthe tool bit 452 as they are captured by the non-magnetic sleeve 454. AnO-ring 460 can optionally be placed between the two magnets 456, 458 toprovide resistance to movement of the floating sleeve 454 if so desired.The opposing poles of the magnets 456, 458 cause the sleeve 454 to floaton the bit 450 until a face of the forward magnet 458 contacts a head ofa fastener that has been placed on the driving end 462 of the tool bit450. Once that contact is made, the sleeve 454 then positions itselfsuch that the fastener remains in place on the bit 450 duringinstallation. Once the faster is securely started, the sleeve 454 can bedrawn back onto the bit 450 if desired where it will remain during thedriving and seating of the fastener.

The foregoing description of the embodiments has been provided forpurposes of illustration and description. It is not intended to beexhaustive or to limit the disclosure. Individual elements or featuresof a particular embodiment are generally not limited to that particularembodiment, but, where applicable, are interchangeable and can be usedin a selected embodiment, even if not specifically shown or described.The same may also be varied in many ways. Such variations are not to beregarded as a departure from the disclosure, and all such modificationsare intended to be included within the scope of the disclosure.

What is claimed is:
 1. A bit holder assembly for a rotary tool,comprising: a body having a shank at its rearward end and a coaxialsocket formed at a second end to allow a tool bit to be insertedtherein, said body having an opening formed in the body in communicationwith said socket; a retraction collar slidably disposed on said body andhaving a forward end extending axially forward of said second end ofsaid body; a coil spring biasing the retraction collar forwardly; aretainer held in a bottom of said opening formed in the body by one ofsaid retraction collar and said coil spring, wherein said tool bit isremoved by sliding the retraction collar rearwardly, to compress thecoil spring and allow the retainer to retract back up the opening; and aring magnet is disposed at and supported directly on said forward end ofthe retraction collar to magnetize a fastener to retain the fastener tothe tool bit.
 2. The bit holder assembly according to claim 1, whereinthe ring magnet is attached directly to said retraction collar.
 3. Thebit holder assembly according to claim 1, wherein said opening in thebody is an angular slot formed in the body and said coil spring biasessaid retainer toward a bottom of said angular slot.
 4. A bit holderassembly for a rotary tool, comprising: a body having a shank at itsrearward end and a coaxial socket formed at a second end to allow a toolbit to be inserted therein, said body having an opening formed in thebody in communication with said socket; a retraction collar slidablydisposed on said body; a coil spring biasing the retraction collarforwardly; a retainer held in a bottom of said opening formed in thebody by one of said retraction collar and said coil spring, wherein saidtool bit is removed by sliding the retraction collar rearwardly, tocompress the coil spring and allow the retainer to retract back up theopening; and a ring magnet is disposed at a forward end of theretraction collar to magnetize a fastener to retain the fastener to thetool bit, wherein said ring magnet is attached to a forward collarreceived on and movable with said retraction collar.
 5. The bit holderassembly according to claim 4, wherein said forward collar is slidablyreceived directly on said retraction collar.
 6. The bit holder assemblyaccording to claim 4, wherein said forward collar is removably receiveddirectly on said retraction collar.
 7. A pivoting driving tool assembly,comprising: a drive component, including a shaft having a driving shankprovided on one end thereof, said driving shank having a non-circularcross-section defined by at least three curved sidewalls; a drivencomponent including a first end having a non-circular cavity pivotallyconnected to the drive component and a second end having a hexagonalaperture; a locking mechanism movable between a disengaged and anengaged position for lockingly engaging the driven component to be inco-axial alignment with the drive component; a tool bit received in saidhexagonal aperture; and a ring magnet disposed at said second end of thedriven component to magnetize a fastener to retain the fastener to thetool bit, wherein said ring magnet is attached to a floating sleeveattached to said driven component, said floating sleeve being slidablymounted on an end of said driven component and spaced from said lockingmechanism.
 8. A tool bit, comprising: a shaft having a shank at a firstend and a working region disposed at a second end, said shaft having ashaft section between said shank and said working region having areduced diameter region disposed between two shoulders, the reduceddiameter region providing a torsion zone that allows the shaft sectionto twist to absorb forces while the tool bit is being used to drive afastener; and a ring magnet assembly movably disposed at said second endof said shaft to magnetize a fastener to retain the fastener to theworking region of the tool bit, wherein said ring magnet assemblycomprises a rubber cup having a flange portion that engages said reduceddiameter region of said shaft between said two shoulders.
 9. A tool bit,comprising: a shaft having a shank at a first end and a working regiondisposed at a second end, said shaft having a shaft section between saidshank and said working region having a reduced diameter region disposedbetween two shoulders, the reduced diameter region providing a torsionzone that allows the shaft section to twist to absorb forces while thetool bit is being used to drive a fastener; and a ring magnet assemblymovably disposed at said second end of said shaft to magnetize afastener to retain the fastener to the working region of the tool bit,wherein said ring magnet assembly comprises a sliding sleeve thatincludes at least one opening therein that receives a retainer ring thatis received in said opening in said sliding sleeve and between the twoshoulders on opposite sides of said reduced diameter region to retainsaid sliding sleeve on said shaft.
 10. A tool bit, comprising: a shafthaving a shank at a first end and a working region disposed at a secondend, said shaft having a shaft section between said shank and saidworking region having a reduced diameter region disposed between twoshoulders, the reduced diameter region providing a torsion zone thatallows the shaft section to twist to absorb forces while the tool bit isbeing used to drive a fastener; and a ring magnet assembly movablydisposed at said second end of said shaft to magnetize a fastener toretain the fastener to the working region of the tool bit, wherein saidring magnet assembly comprises a sliding sleeve that is retained on saidshaft by one or more balls that is received in a hole in said slidingsleeve and between the two shoulders on opposite sides of said reduceddiameter region.
 11. The tool bit according to claim 10, wherein saidone or more balls is retained in said hole by a sheet metal spring thatpartially surrounds said sliding sleeve.
 12. A tool bit, comprising: ashaft having a polygonal shank at a first end and a working head regiondisposed at a second end and extending to a shoulder that separates theworking head region from the shank; and a ring magnet movably disposedat said second end of said shaft to magnetize a fastener to retain thefastener to the working head region of the tool bit, wherein saidworking head region includes a recessed groove therein for receiving aretainer ring therein, said ring magnet being supported by a sleeve thatis retained on said shaft by said retainer ring.